[R-390] first radio thread

[John Kolb]

At 08:10 AM 8/17/2011, Jim wrote:

>I remember a time, in the mid-1960s I guess, when a tool was on the market
>that was sold as a soldering iron, with suitable tips, by electronics
>vendors and as a wood burner, with suitable tips, by hobby places.  I
>don't remember now if it was Weller or some other brand. The handle was
>red or maroon and had a candelabra screw socket and a cork finger grip.
>The heating element was white ceramic and screwed into the socket - maybe
>there were different wattages of heating elements.  And then the tip
>screwed over a tip on the heating element.


That would be Ungar.  Still around as a niche product, but with the 
tip not grounded
and no temperature control, not too good for solid state electronics.
http://www.elexp.com/sdr_7400.htm